Константин Величко

$('#block-new40').hover(function(){
    $(this).css('opacity', '1');
});

function setOpacity (myElement, opacityValue) {
    if (window.ActiveXObject) {
        myElement.style.filter = "alpha(opacity="
             + opacityValue*100 + ")"; // IE
    } else {
        myElement.style.opacity = opacityValue; // Gecko/Opera
    }
}